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#ifndef _LINUX_JUMP_LABEL_H
#define _LINUX_JUMP_LABEL_H
#if defined(CC_HAVE_ASM_GOTO) && defined(CONFIG_HAVE_ARCH_JUMP_LABEL)
# include <asm/jump_label.h>
# define HAVE_JUMP_LABEL
#endif
enum jump_label_type {
JUMP_LABEL_ENABLE,
JUMP_LABEL_DISABLE
};
struct module;
#ifdef HAVE_JUMP_LABEL
extern struct jump_entry __start___jump_table[];
extern struct jump_entry __stop___jump_table[];
extern void arch_jump_label_transform(struct jump_entry *entry,
enum jump_label_type type);
extern void arch_jump_label_text_poke_early(jump_label_t addr);
extern void jump_label_update(unsigned long key, enum jump_label_type type);
extern void jump_label_apply_nops(struct module *mod);
extern int jump_label_text_reserved(void *start, void *end);
#define jump_label_enable(key) \
jump_label_update((unsigned long)key, JUMP_LABEL_ENABLE);
#define jump_label_disable(key) \
jump_label_update((unsigned long)key, JUMP_LABEL_DISABLE);
#else
#define JUMP_LABEL(key, label) \
do { \
if (unlikely(*key)) \
goto label; \
} while (0)
#define jump_label_enable(cond_var) \
do { \
*(cond_var) = 1; \
} while (0)
#define jump_label_disable(cond_var) \
do { \
*(cond_var) = 0; \
} while (0)
static inline int jump_label_apply_nops(struct module *mod)
{
return 0;
}
static inline int jump_label_text_reserved(void *start, void *end)
{
return 0;
}
#endif
#define COND_STMT(key, stmt) \
do { \
__label__ jl_enabled; \
JUMP_LABEL(key, jl_enabled); \
if (0) { \
jl_enabled: \
stmt; \
} \
} while (0)
#endif
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